pyrfu.mms.get_pitch_angle_dist module#

pyrfu.mms.get_pitch_angle_dist.get_pitch_angle_dist(vdf, b_xyz, tint: list | None = None, **kwargs)[source]#

Computes the pitch angle distributions from l1b brst particle data.

Parameters:

  • vdf (xarray.Dataset) – to fill

  • b_xyz (xarray.DataArray) – to fill

  • tint (list of str, Optional) – Time interval for closeup.

  • angles (int or float or list of ndarray) – User defined angles.

  • meanorsum ({'mean', 'sum', 'sum_weighted'}) – Method.

Returns:

pad – Particle pitch angle distribution

Return type:

xarray.DataArray

Examples

>>> from pyrfu import mms

Define time intervals

>>> tint_long = ["2017-07-24T12:48:34.000", "2017-07-24T12:58:20.000"]
>>> tint_zoom = ["2017-07-24T12:49:18.000", "2017-07-24T12:49:30.000"]

Load ions velocity distribution for MMS1

>>> vdf_i = mms.get_data("pdi_fpi_brst_l2", tint_long, 1)

Load magnetic field in the spacecraft coordinates system.

>>> b_dmpa = mms.get_data("b_dmpa_fgm_brst_l2", tint_long, 1)

Compute pitch angle distribution

>>> options = dict(angles=24)
>>> pad_i = mms.get_pitch_angle_dist(vdf, b_dmpa, tint_zoom, **options)